Nokia 3310 and 3315 appear to be same. In all probability the key pad arrangement is different. I purchased 3315 model and after usage of two months to my surprize the central menu key stopped responding. I am chasing the supplier for either repair or replacement but no constructive response so far.
If Nokia does not give proper after sale services I am afraid what will happen to its popularity. Nokia handsets are user friendly easy to use. Cost wise also Nokia is affordable. There are costlier versions available but if you see cost verses benefit there is no much of benefit in costly models as a phone. Let it be a phone not camera nor a radio. It should provide good phone service for a roamer where he is.